摘要
针对严寒地区地源热泵水平埋管换热器的传热规律及其制约因素,建立加土壤保温层水平埋管换热器周围土壤不稳定温度场的物理和数学模型,并对所建立的模型进行模拟计算及实验验证。研究加保温层前后埋管周围土壤的温度变化以及不同运行方式下埋管周围土壤的温度场。结果显示:加土壤保温层后,单埋管换热器周围土壤温度提高1.30℃,双埋管换热器周围土壤温度提高约1.20℃。间歇运行比连续运行更有利于土壤温度的恢复,埋管换热量也得到提高。
This paper aimed at the level of ground source heat pump buried pipes heat exchanger heat transfer law and restriction factor in cold area, unstable temperature field of the physical and mathematical model of horizontal buried pipes heat exchanger after add insulation layer was established, and the simulating calculation and experimental verification of the proposed model was presented. Based on soil thermal insulation layer, the change of temperature around soil was studied. The soil temperature field around the buried tube under different operation modes was also studied. The result showed that after add insulation layer of soil, the soil around the buried tube heat exchanger temperature increased 1.30 ℃ , double soil temperature around the buried pipes heat exchanger by about 1.20 %. Intermittent operation is more conducive to the recovery of soil temperature than continuous operation ; the heat exchange has also been improved.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2014年第3期540-545,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(青年基金)(50606007)
"十一五"国家科技支撑计划重大项目(2006BAJO3A05-07)
关键词
土壤源热泵
严寒地区
水平埋管
换热器传热量
ground-source heat pump
severe cold area
horizontal buried pipe
heat exchanger transfer
